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Finding the Fourth Proportional to 81,766.17, 122,649.21 and 21,794.67

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Solution

The fourth proportional to 81,766.17, 122,649.21 and 21,794.67 is: 32,691.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,766.17 : 122,649.21 = 21,794.67 : x
  2. Step 2: Convert to fraction form
    81,766.17/122,649.21 = 21,794.67/x
  3. Step 3: Cross multiply
    81,766.17x = 122,649.21 × 21,794.67
  4. Step 4: Simplify right side
    81,766.17x = 2,673,099,057.71
  5. Step 5: Solve for x
    x = 2,673,099,057.71/81,766.17
  6. Step 6: Final answer
    x = 32,691.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.